Cement-mixing machine.



L. A. DAVIS.

CEMENT MIXING MACHINE.

APPLICATION FILED JUNE 26, 1912.

1,072,318. Patented Sept. 2, 1913.

LEWIS A. DAVIS, OF EVERETT, WASHINGTON.

CEMENT-MIXING MACHINE.

Specification of Letters Patent.

Patented Sept. 2,1913.

Application filed June 26, 1912. Serial No. 706,031.

To alt whom it may concern:

Be it known that I, LEWIS A. DAvIs, a citizen of the United States, residing at Everett, in the county of Snohomish and State of lVashington, have invented new and useful Improvements in Cement-Mixing Machines, of which the following is a specification.

An object of the invention is to provide a machine tor tlmroughly and efficiently illlXll'lg cement to form concrete and the like.

The invention embodies, among other features, a machine in which the contents of the drum can be withdrawn llliGI'Oifl'Ol'il when the ingredients in the drum have been properly mixed, without disturbing the rotation of the drum.

In the further disclosure of the invention reference is to be had to the accompanying drawings constituting a part of this specification, in which similar characters of reference denote corresponding parts in all the views, and in which:

Figure 1 is a vertical sectional view of the device, the discharge chute being shown in discharging position in full lines and in closed position in dotted lines; Fig. 2 is a front elevation showing the discharge chute in closed or inoperative position; Fig. 3 is a fragmentary vertical sectional view taken on the line 33 in Fig. 1; and Fig. 4 is a fragmentary vertical sectional view taken on the line i t in Fig. 1.

Referring more particularly to the views, I employ a drum 1.0 of any preferred con struction, the said drum consisting of a plu rality of connected frusto-conical casings 11 provided with apertures 12 and 13, a collar 14: provided with teeth 15 on the periphery thereof, being mounted to encircle the frusto-conically shaped casings 11 at their point of connection, as shown. Extending around the inner surface of the frusto-conically shaped casings 11, at their point of connection and arranged in spaced relation, are a series of buckets 16, and a funnel shaped feeding member 17 has an end thereof mounted to extend through the aperture 12 and into the interior of the drmn 1.0, the said mentioned drum being mounted on a suitable frame 18 with the teeth 15 of the collar 1 1 engaged by a suitable driving mechanism 19 for imparting rotation to the drum, it being understood that the funnel shaped member 17 is arranged in stationary position on thc frame 18 and will not rotate when the drum is rotated.

A standard 20 is secured within the drum 10 and is provided with a bearing 21 in which is journaled one end of a horizontally extending rod 22, a standard 23 being secured to the rod 22 to support an inclined stationary chute 2 1, the said chute being arranged so that; when the drum is rotated the contents of the buckets 16 will gravitationally fall into the chute when the buckets reach the upper extremity of their travel. An upwardly extending bracket 25 is socured to the other end of the rod to support the lower end of the stationary chute 2 1: and u'u'iunted exteriorly of the drum are a plurality of inclined brackets 26 terminating in a head 27 having mounted therein one end of a rod 28, extending horizontally through the opening 13 and provided with a fork shaped bracket 25), the bracket 2!) having rigid connection with the lower end of the chute to aid in securing the same rigidly within the drum 10.

Mounted to depend from the rod 28 is a T-shaped member 30 having nlounted to swing thereon a discharge chute 31, the said discharge chute beir arranged so that when the discharge chute is in lowered position, the upper end of the discharge chute will overlap the bottom of the lower end of the stationary chute 24:, thus supporting the discharge chute ill in discharging position and in substantial alinement with the chute 341-, the mentioned discl argc chute 31 being arranged to extend from the lower end of the chute 2 1-, through the opening 13 with the outer end of the discharge chute arranged exteriorly of the drum 10.

Mounted to swing on a frame 32, provided to support the drum 10 in operative position, is an L-shaped o 'icrnting lever 33 having pivotally connected to the lower free end thereof a collar 34 encircling a rod 35, secured to the under side of the discharge chute 31, it bcin readily seen that when the upper or handle end of the lever is swung rearwardly, the discharge chute will be moved into closed or inoperative position as shown in dotted lines in Fig. 1, said discharge chute, when in this position, being adapted to prevent the discharge of the con tents of the drumthrough the opening 13 and adapted to act as a battle for the chute 24, so that when the contents of the chute 24:

is discharged from the lower end thereof,

to the center of the drum to be again taken up by the buckets 16.

p A series of rollers 36 is preferably mount l ed on the frame 32 to support the drum so that the same can be subjected to rotation and in the use of the device the ingredients are first poured into the funnel shaped member 17, after which the drum is rotated to 'monnted to swing on the said frame and thoroughly mix the ingredients within the drum, thus forming a cement of a plastic nature. Now as the drum rotates the cementwill be scooped up by the buckets 16 and carried around with the drum, it being readily understood that as each bucket reaches a position immediately over the chute 24:, the contents of the bucket will be dumped into the" chute and will gravitate down the chute. Now as the discharge chute 31 has been previously secured in inoperative or non-discharging position, the contents of the chute 24 will strike the lower end of the chute 31 and thus be prevented from passing through the opening 13 in the drum 10.

position shown in full lines in Fig. 1, this being the discharging position of the chute,

so that the contents of the chute 24: can readily pass into the chute 31 and be discharged from the lower end thereof into a suitable receptacle mounted beneath the same.

Having thus described my invention, I claim:

In a device of the class described, the combination with a frame, of a revoluble drum mounted thereon, a stationary chute rigidly secured within the said drum, a second chute having the inner end thereof movable into or out of engagement with the first mentioned chute, with the upward swinging movement of the inner end of the second mentioned chute adapted to be limited by the first men tioned chute, a rod secured to the under side of the second mentioned chute, and a lever mounted to swing on the frame and having slid-able engagement with the said rod where by, when the said lever is actuated, the said second mentioned chute will be swung into or out of engagement with the first mentioned chute.

In testimony whereof I my signature in presence of two witnesses.

LEWVIS A. DAVIS. l/Vitnesses:

WM. WV. CHAMBERLAIN, l/V. WV. BURGISS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. (3. 

